NEMA Starters & Contactors

Leading the Industry with the largest selection of NEMA Starters

NEMA starters are ideal for applications requiring dependability and durability. Typical applications include use with machine tools, air conditioning equipment, material handling equipment, compressors, hoists and various production and industrial equipment, as well as in demanding automotive applications.  These starters are built rugged to withstand the most severe and demanding industrial and continuous duty commercial applications in the industrial and construction markets. This includes standard full NEMA sizes and motor matched half sizes exclusive to Siemens. Starters are available as open and enclosed with electronic overload protection, as well as a wide selection of accessories and spare parts.

Technical specifications for NEMA starters & contactors

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Non-Reversing

Starters & Contactors

Non-Reversing Starters & Contactors

Non-Combination Starter: Class 14

Combination Starter: Class 17, 18

Non-Reversing Contactor, Class 40

Reversing

Starters & Contactors

Reversing Starters & Contactors

Non-Combination: Class 22

Combination: Class 25, 26

Reversing Contactor, Class 43

Two-Speed

Starters

Two-Speed Starters

Non-Combination: Class 30

Combination: Class 32

Reduced Voltage Starters

Class 36 & 37, 88

Reduced Voltage Starters, Class 36 & 37, 88

Class 36 and 37 electromechanical reduced voltage starters

Siemens manufactures the three commonly used electromechanical reduced voltage starters. Each one is designed for specific application requirements and consists of auto transformer, wye-delta and part-winding starters. The reduced voltage starter:

  • Reduces inrush current
  • Provides smoother acceleration of  the load
  • Reduces starting torque
  • Reduces stresses on mechanical linkages

Class 88 NEMA reduced voltage pump control panels

The Siemens Class 88 reduced voltage starter pump controllers consist of the same type of Class 37 starters and their benefits with added features. The added features make the Class 88 ideal for pump control applications and include the following:

  • Type 3/3R enclosure which is fully gasketed to ensure a dust tight and water tight seal
  • Rugged 30 mm H-O-A switch and Start push button as standard
  • The ESP200 solid-state overload relay has a protective coating on the circuit board which gives it superior protection against high humidity, condensation and corrosive environments.
  • UL rated as Service Entrance Equipment

Auto Transformer Starter, Class 36&37

Wye-Delta Starter, Class 36&37

Part-Winding Starter, Class 36&37

Reduced Voltage Starter, Class 88

Vacuum Contactors

Vacuum Contactors, Class 40

Vacuum Contactors, Class 40

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Refined pushbuttons and indicator lights for extreme conditions

You’re going to need modern and reliable operator controls when your machines or systems are operated outdoors due to exposure to harsh elements. Leitner ropeways can testify that the look and feel of our rugged and refined SIRIUS ACT devices.

Clean wastewater pumps without fiber collection

Impellers are frequently blocked by sanitary and other waste products that are not intended for removal in wastewater. Blockages of this kind can be a costly aspect of wastewater handling and have to be removed manually. This is why its helpful to have SIRIUS soft starters, they can help reduce this manual effort when your pumps get blocked

Avoiding failures due to load fluctuations

Loads fluctuate when bulk solids are being conveyed or processed. These fluctuations might be caused by a change in the angle of the conveyor belt, which influences the parameters. If the parameters that you have selected for subsequent motor starts do no match the altered load, you can damage the machine or get an aborted start. But, you can avoid all of this with the SIRIUS soft starters. They make it easier to start your conveyor systems.

Stopping pumps without water hammer

Switching off pumps that carry large volumes of water is a critical issue for wastewater plant operators. The pump stops immediately, causing the water in the pipes to also stop immediately and the kinetic energy left in the water is transmitted as water hammer causing serious damage to pipes, couplings, valves, and seals. But, abrupt stopping can be avoided with the SIRIUS 3RW55 soft starter’s pump stopping function.

Reducinging maintenance work in conveyor systems

In a conventional set-up, contactors have to be repeatedly replaced due to contacts welding as a result of the continuous load on the conveyor lines. This leads to a high amount of maintenance work with repeated short system downtimes. That’s where space-saving distributed motor starters can play a vital role; Siemens introduces the SIMATIC ET 200SP with hybrid technology and integrated diagnostics data.

Safe, space-saving control of assembly conveyors

Get more functionality in a small amount of space with SIRIUS motor starters. When it comes to employee safety at assembly stations, assembly conveyors must comply with very strict requirements. If the system also has to be flexible at the same time, compact, safe motor starter solutions are required so that enough space is left in the control panel for future modifications and expansions.

Reliable design for conveyor belt motors

Conveyor systems are usually modernized to optimize plant operation and availability and when the motors behind these systems are monitored effectively, changes and imminent interruptions to the operation can be detected early. In order to see this early detection, any additional diagnostic equipment must be integrated within the existing space already occupied by the plant. That's where a comprehensive conditioning and fault monitoring process plays a vital role. Which is why SIRIUS soft starters are your go-to solution for conveyor belt motors.

Modular industrial controls

No machine or plant can be managed without low-voltage controls; every device, be it a protection, switching, measuring or monitoring device, has to be individually selected, designed and commissioned. This calls for expertise and experience from users in all industry sectors.

Setting authorizations for machine access individually

Many industrial machines and systems may only be operated by authorized personnel and are fitted with key-operated switches. However, if certain machine functions are only supposed to be available for a specific person or group, this cannot be achieved by using simple key-operated switches and need more sophistication. What if you could have switches with RFID technology to enable a complex management of rights?

Protecting pumps in hazardous areas against dry running

If flammable media are transported in hazardous areas, the centrifugal pumps used must be protected against dry running. Therefore, they are monitored conventionally with level sensors, however, these are susceptible to faults and require intensive maintenance. With SIMOCODE pro, Siemens supplies an innovative monitoring technology that redefines dry-running protection in hazardous areas.

Blocked pumps are a topic of the past

Every water utility is familiar with the problem of a blocked pump and the possible consequences. Environmental impacts, damage due to flooding, as well as health hazards associated with the lifting and cleaning of pumps, you’ve had experienced them all. Another problem can be the financial impacts of a plant shutdown. In your search for a suitable solution, operators, like you, take certain approaches into account, such as the over-dimensioning of pumps. The removal of blockages is often a routine service task. Now, with SIMOCODE pro’s solution for blocked pumps, you can save time and money.

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